Having built over a dozen Ger's (yurts with straight roof poles) I have used various resources in the past, starting in the beginning with my first Ger through simple observation and visualization. Over time I started using other people's templates, and by far the best resource I have come across is the website linked below. Great for low impact living, training spaces, parties, etc, these low cost portable structures are simple to make with basic sewing and carpentry skills, and can even be made snow proof for up to 1m of snow in line with engineering codes.